Clef: Open-weight decision models, and new RL fine-tuning platform

Cloudflare has introduced Clef, an open-weight decision model designed to provide cheap, fast, and consistent bounded structured outputs for workflows requiring decisions. Unlike Large Language Models (LLMs), Clef is deterministic and excels at classification without constant retraining for new categories. It offers improved accuracy, outputs probabilities instead of text generation, and is faster than models like Jev and base Qwen models. Clef can be used for tasks such as determining urgency, assigning teams, and assessing severity based on defined criteria.